#include 

#include 

#include 

using namespace std;

char IntToChar(int target) {

  if (target < 10) {

    return target + '0';

  } else {

    return target - 10 + 'A';

  }

}

void Convert(int number, int x) {

  vectorint> answer;

  if (number == 0) {

    answer.push_back('0');

  } else {

    while (number != 0){

    answer.push_back(IntToChar(number % x));

    number /= x;

    }

  }

  for (int i = answer.size() - 1; i >= 0; --i) {

    printf("%c", answer[i]);

  }

  printf("\n");

}

int main() {

  int n;

  while (scanf("%d", &n) != EOF) {

    Convert(n, 8);

  }

  return 0;

}
